Я могу создать запись даты и времени для новой записи, которая успешно сохраняется. Однако виджет ввода даты и времени недоступен, когда я хочу обновить и внести изменения. Я не понимаю почему. Новый и обновленный маршрут используют один и тот же шаблон crete_post. html. Я включил этот шаблон ,ways.py и forms.py ниже.
Любой совет будет высоко ценится. 
create_post. html
...
<div class="form-group">
<h5> Date and Time</h5>
{% if form.date_posted.errors %}
{{ form.date_posted(class="form-control form-control-lg is-invalid") }}
<div class="invalid-feedback">
{% for error in form.date_posted.errors %}
<span>{{ error }}</span>
{% endfor %}
</div>
{% else %}
{{ form.date_posted }}
{% endif %}
{% if form.time_posted.errors %}
{{ form.time_posted(class="form-control form-control-lg is-invalid") }}
<div class="invalid-feedback">
{% for error in form.time_posted.errors %}
<span>{{ error }}</span>
{% endfor %}
</div>
{% else %}
{{ form.time_posted }}
{% endif %}
</div>
...
rout.py
...
@app.route("/post/new", methods=['GET', 'POST'])
def new_post():
form = PostForm()
if form.validate_on_submit():
post = Post(title=form.title.data,
description=form.description.data,
status=form.status.data,
priority=form.priority.data,
date_posted=form.date_posted.data,
time_posted=form.time_posted.data,
assigned_to=form.assigned_to.data,
reported_by=form.reported_by.data)
db.session.add(post)
db.session.commit()
flash('Your post has been created!', 'success')
return redirect(url_for('home'))
return render_template('create_post.html', title='New Post', form=form,
legend='New Post')
@app.route("/post/<int:post_id>")
def post(post_id):
post = Post.query.get_or_404(post_id)
return render_template('post.html', title=post.title, post=post)
@app.route("/post/<int:post_id>/update", methods=['GET', 'POST'])
# @login_required
def update_post(post_id):
post = Post.query.get_or_404(post_id)
form = PostForm()
if form.validate_on_submit():
post.title = form.title.data
post.description = form.description.data
post.date_posted=form.date_posted.data,
post.time_posted=form.time_posted.data,
post.status = form.status.data
post.priority = form.priority.data
post.assigned_to = form.assigned_to.data
post.reported_by = form.reported_by.data
db.session.commit()
flash('Your post has been updated!', 'success')
return redirect(url_for('home', post_id=post.id))
elif request.method == 'GET':
form.title.data = post.title
form.description.data = post.description
form.date_posted = post.date_posted
form.time_posted = post.time_posted
form.status.data = post.status
form.priority.data = post.priority
form.assigned_to.data = post.assigned_to
form.reported_by.data = post.reported_by
return render_template('create_post.html', title='Update Post',
form=form, legend ='Update Post')
forms.py
status_options = [('ongoing', 'ongoing'), ('completed', 'completed')]
priority_options = [('moderate', 'moderate'),('high', 'high'),('low','low')]
class PostForm(FlaskForm):
title = StringField('Title', validators=[DataRequired()])
description = TextAreaField('Description')
date_posted = DateField('Date')
time_posted = TimeField('Time')
status = SelectField('Status',choices = status_options)
priority = SelectField('Priority',choices = priority_options)
assigned_to = StringField('Assigned To')
reported_by = StringField('Reported By')
submit = SubmitField('Save')